Schedulr - Schedulr makes it easy to meet with others w/out the headache of back-and-forth emailing.
Meetingbird for Gmail - View your calendar and schedule meetings right from Gmail
Kin Calendar - The simple and connected calendar
Coffee Chats - Beautiful one-page sites that sync to your calendar to easily schedule chats. Plus, Coffee Chats connects with Stripe so you can easily charge for chats turning Coffee Chats into your all-in-one site, booking, and payments solution.
Calendly for Chrome - Schedule meetings without leaving your inbox
Google Calendar - Spend less time managing your day & more time enjoying it